Rotary pump



2 Sheets-Sheet`.

(No Mode.)

C. GOMSTOGK. 30mm PUMP.

Patented Aug. 2l, 1883.

n. mens. Pmwumsmyn (No Model.) 2 Sheets-Sheet 2.

' G. COMSTOGK.

Y ROTARY PUMP. No. 283,377. Patented Aug. 2l, 1883-.

@fr Waag@ 5mm;

N. Parana mawmmgnmf, Mmmm, D. c

Pfrrnrrr Prion.

CHESTER COMSTOCK, OF NEWT CNAAN, CONNECTICUT.

ROTA RY PU M P.

SPECIFICATION forming part of :letters ments in rotary pumps, whereby simplicity and strength in construction and great effi-v ciency in .operation are obtained, and my invention consists, first, in mak ing the sides of the water-path inAthe annular chamber converge toward each other, so as to make a very tight joint, compensating for the wearing. of

' theparts, second, in taperingthe bearing-edges of the buckets orblades for taking up and delivering the water to conform to the converging sides of the annular chamber, so that they will wear evenly therewith, and hence insure a: tight joint at all times, third, in adapting the buckets or blades to be projected from or withdrawn into recesses in the revolving cylinder by means of engaging levers operating in a guide-groove; fourth, in making the buckets or blades in two parts', the bearing portions of which are adapted to be self-adjusting independent of any pressure from the'revolving cylinder, all as hereinafter more fully described.

ln the accompanying drawings, Figure lis a. longitudinal section of my improved rotary pump, taken through the cylinder and inlet.

and outlet nozzles, (the portion B of the revolving cylinder being removerh) and showing that portion, B2, of the revolving cylinder containing the operating rock-shaft and arms. Fig. 2 is a crosssection through the pumpchamberand revolving cylinder, showing -the slots in which theforward and backward movements of the buckets or blades are made. Fig. 3 is an outside view of the revolving cylinder, with the upper bucket or blade projecting therefrom. Figs. 4, 5, 'and 6 are detail views ofthe seliladjusting buckets or blades. Fig. 7 is a plan view of the guide-groove for operating the levers to adjust the buckets or blades. Fig. 8 is an'end view of the revolving cylinder, showing the method of operating the rockshai't and lever-arms engaging with the-levers toadjust the buckets or blades. Fig. 9 is an Patent No. 283,377, dated August 21, 1883.

` Application cleo January 21, iss-2. (No model.)

end view of same with wearing-cap in place. Figs. l0 and 1l are detail views of the rockshaft and lever-arms. Fig. l2 is an outside -view of the l11 u1npchaniber cover I, showing by dotted lines the relative position of the parts shown in Fig. 7.

Similar letters of reference indicate corresponding parts in all the figures.

A is the fixed body or case ofthe pump, consisting of ahollow cylinder closed at both ends. The revolving cylinder or piston of the pump is composed of two portions, B B2, arranged within the body A, and keyed or otherwise fastened to the shaft C, which works in bearkings formed in the two ends of the pump-case. This shaft C can bc operated by hand, steam, or other motive power.

J J designate two slots in the revolving cylinder, in which are placed the self-adjusting buckets or blades D D, each formed of'two parts, d and di. rlhe buckets or blades l) D are each operated by alever, e, attached tothe rock-shaft E, which is itself rotated to and fro by means of the roller j', attached to the lever-arm F, and wearing within the guidegroove m of the pump-chamber cover'l. It will be seen that the guide-groove is for about three-fourths of its length, as designated by m m', concentric with the shaft C, and the remaining portion, fm? m?, is eccentric thereto, and by this means the levers controlling the buckets or blades act to keep the buckets or blades to their places in the annular pumpchamber, and act to with/draw them succesis bolted to the lower portion of the pumpchamber, between the inlet or suction and outlet or discharge nozzles L and M, respectively.

K designates the annular chamber .of the pump, and when the buckets or bladesy D D are thrown out for operation they divide it into two water-tight compartments, and as the shaft C, carrying the cylinder, rotates, the capacity of each compartment increases and diminishes proportionately as the wat'er is drawn in and forced out by the rotation of the shaft. The annular chamber K is the water way or chamber of the pump; and its sides sivrely to pass the partition or division G, which.

converge, and the blades or buckets are also roo made with converging sides to correspond therewith, so as to always insure a correct fit of the blades in the water-way, when they are adjusted, as they become worn. t

The partition Gr is provided with a longitudinal slotor groove, and an independent adjustable plate, g, with abroad bearing-surface, is fitted therein to bear against the revolving cylinder B B2, and this plate g is kept up to its position against the revolving cylinder B B2 by means of a pressure-spring, y', and thereby adjusts itself to conform to the wearing. Instead of this spring, set-screws or other like devices may be used for this purpose. v

rlhere are two wearing-caps, H H2, one fastened to each end of the revolving cylinder, lwhich revolve each in a counter-bore at the ends of the pump-chamber. The wearing-cap H2 is provided with slots or openings 71, to provide for the sweep of the lever F. The cylinder or piston is made in two parts, BB2, in order to facilitate the formation therein of the cavities, recesses, or slots to receive its several attachments. These two parts may be connected by set screws or equivalent means, substantially as indicated by dotted lines in Fig. The selfadjusting buckets or blades D D are made in two pieces, one within the other. The body of the blades has an edge kerf or recess, in which fits the wearing portion (Z2. This wearing portion has two legs straddling the operating-hub d', and a spring, d", is interposed between Said hub and the horizontal wearing-rib connecting the legs of said portion cl2. The portion-cl2 has in it slots d5 d5, and in these slots, and within the kerf of the body of the blade, are arranged rings d d, through which pins d d pass' to connect the wearing portion and body and permit thc movement of said wearing portion without cramping. (See Fig. 2 and dotted lines, Figs. 3, Ll, 5, and 6.)

In operation, motion is imparted to the revolving cylinder B B2 by means of the shaft C, which projects out through a stuffing-box in the cover l of the pump-chamber. As the cylinder B B2 revolves on its axis the roekshafts E are carried with it, and thc levers F thereto attached are forced to andV from the center of the shaft by means of the friction rollers f, connected to the levers F and wearing in the guide-groove m. Vhile the frictionrollers j" are in the circular portion of the guide-groove from m to m, the distance of the -friction-rollers f from the center of the shaft remains the saine and has no effect on the mo,- tion of the rock-shafts E but when the rollers pass through the portion from m2 to- 'm2 they are gradually carried away from the center of the shafts and the rock-shafts E are caused to rotate, carrying with them the levers e, engaging in the buckets or blades D, intoand'toward the center of the shaft, so that the buckets or blades will be able vto pass the partition G, as shown by the position of the lower lever, e, and bucket or blade D in Fig. l of the drawings. This operation is kept up while the revolutions `of the cylin- /ders are being made, the levers e and F changing their positions, as shown by dotted lines in Fig. S, the lever F, with roller f, moving from position :v to position y, andI the leverarm c from x to y', being the throw backward and forward of the buckets or blades D D in each revolution.` -lt will be seen that sufficient clearance is provided in the wearingcap H2, by means of the slots or openings h, to permit the movement of the levers F, with the rollers f moving in the guide-groove m.

By my invention l produce a rotary pump which can bc operated by hand, steam, or

other motive power, and in which the conj struction of the different parts is such that the frictional surfaces which come in contact adjust themselves to each other, so as to compensate for wear. One advantage consists in converging the sides of the water-path in the annular chamber toward each other, and in tapering the bearing-edges of the buckets or blades to correspond therewith. Another advantage consists in making each bucket or blade in two pieces connected together, and adapted to be projected from or retired into the revolving cylinder at the proper time by the mechanism described, the wearing-surface of each bucket or blade being held to its place against the converging sides of the water-path in the annular chamber, `and adapted toaccommodate itself to the wearing-surface thereof by means of a spring or other like device. Another advantage consists in making the partition or division between` the suction and discharge openings of a rotary pump in two pieces', that portion which is in contact with the revolving cylinder being held to its place by a spring or other like device, so that it will wear itself to aperfect wearing-surface, compensating for the wear of the contact-surface of the revolving cylinder.

lVhat I claim as my invention, and desire to secure by Letters Patent, is-

l. In a rotary pump having a shell and a IOO.

IIO

rotary piston therein, as described, the annular waterway K between the periphery of the piston and the rim of the shell, having convergent sides, and the buckets or blades D D, the edges whereof are convergent and fit and operate in such annular convergent water-way, substantially as shown and described. 2. The buckets or blades of a rotary pump, composed of two portions, one within the other, held together by kpins and rings d2 d, combined with the hub d and spring d", substantially as shown and described.

3. The combination, substantially as shown and described, of the case A, having a suitable inlet and outlet, cylinder B B2, provided with buckets working in a divided water-way in the case, the head I, having the groove m, and the friction-rollers f, working in said groove and borne by levers F, which 283,37*? l d Y 3 operate the `levers e, throughthe rook-shafts E, to project and Withdraw the blades or buckets, L11 as et forth.' 'e f 4. The Wearing-cap H2, provided with open- 5 ings zf, combined with the blade-operating levers, substantially as and lfor Jshe purpose described.

5r The combination, substantially as shown :md described, of the carp I; having the groove mf, and the Wearing-cap H2, having the openro ings h, with the operating-levers 0f the pump blades or buckets, as and for the purpose specified.

CHESTER COMSTOGK.

Wituesses: Y

ERNEST C. VEBB? vARTHUR C. WEBB. 

